Gem'X
Platform: Amiga 500
Region: Europe
Media: Floppy
Controller: Joystick
Genre: Puzzle - Multi-Screen - Comical
Gametype: Licensed
Release Year: 1991
Developer: Kaiko (A.U.D.I.O.S.)
Publisher: Demonware Softwarehaus
Players: 1 or 2
Hardware: OCS, ECS
Conversions: Atari ST - Commodore 64
Disks: 1
Programmer: Torsten Lamparter
Musician: Chris Hülsbeck (Huelsbeck)
Designer: Frank Matzke
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Like so many other puzzle games of the time, this game involves tiles of different colours, which must be manipulated to clear a succession of increasingly-difficult levels.

The basic idea is that you are presented with 2 sets of tiles, and must make the left one identical to the 'control' set on the right. The colours are defined in a sequence - red, green, blue, purple, yellow - and when you click on a tile, that tile's colour moves forward by two in that sequence (for example a blue one becomes yellow), whereas the tiles next to it move by one colour (for example, blue becomes purple). 

Any that move past the end fo the sequence disappear, causing surrounding blocks to drop. You get a limited number of moves, and limited time as well. Fortuantely there are passwords, delivered by cutely-drawn naked Japanese girls (although the private parts are covered up).
 
http://www.mobygames.com/game/amiga/gemx
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CHEATS:

Level skip:
Press [Return] during game play to advance to
the next level.

Level|Password

B|EARTHIAN

C|KENICHI

D|INOKHUMA

E|BURAI

F|BADMAN

G|NETWORK

H|YOKOHAMA

I|EXACT

J|X68000

K|TURRICAN

L|REDMOON

M|CAMPAIGN

N|MAGAMANN

O|SYVALION

P|FMTOWNS

Q|CHIERIE

R|GAMERION

S|ZAWAS
